Spaeham



TEhi/ENOE SPARHAM, OF BROOKVILLE, ONTARIO, CANADA.

r ROOFING-CEMENT.

. i SPECIFICATION formingpart of Letters Patent N0. 229,924, dated July13, 1880.

it may concern B t zlown that I, TERENcE SPARHAM, of the town ofBrockville, in the county of Leeds, in th ovince of Ontario, in theDominion of C n doctor of medicine, have invented a 116 a d usefulRoofing-Cement, which I have cal e Sp'arhams Fire-Proof Roofing-Oefwhichis fully described in the follow- 111g pecification.

My nvention relates to an improved roofing cement or composition, andhas for its object the production of a cheap and effective roofing G psition adapted to be applied in a plastic stat and which when so appliedand hardened Sh be both water and fire proof; andit con- SISCS f aroofing cement or composition, as a new ticle of manufacture, composedof plumagqftnd soapstone finely powdered and thoroughy mixed withcoal-tar or other liquid bitqmHous substance, in the proportions and HQeI' hereinafter fully described.

, preparing this cement or roofing comp0S on, I take plumbago andsoapstone in 0116 Pfoportion of one part of plumbago to three par ofsoapstone, powder them finely, and 11 hem thoroughly together. To thismixt l I add enough coal-tar or other liquid binous substance to givethe mixture such a fistency that the composition resulting shallifficiently plastic to enable it to be read- 11y End efasily spread uponthe roof or other Jct top which it is desirable to apply it.

enerally the proportion of coal-tar or other liq d bituminous substancewill be about one Application filed November 8, 1879.

part of bituminous liquid to two parts of the powdered mixture; but asthe consistency of coal-tar varies considerably at different times, I donot confine myself to the proportions above named, but vary the amountof coal-tar according to its quality and consistency, as otherwise theconsistency of the cement or composition would be too variable. It isalso evident that the proportions of the powdered ingredients may besomewhat varied without materially detracting from the effectivequalities of the composition as a practical roof-covering.

This composition makes a very tough elastic roofing, not liable tocrack, perfectly fire and water proof, the plumbago serving as a veryefficient binding material to hold the soapstone together, and makes amore durable roofing than powdered clay, steatite, mica, and asphalt,which, I am aware, have been used to form a roofing composition.

What I claim as new, and desire to secure by Letters Patent of theUnited States, is

A roofing cement or composition composed of powdered plumbago,soapstone, and coaltar or other liquid bituminous substance, united inabout the proportions herein set forth, as a new article of manufacture.

T. SPARH AM.

Witnesses: Y

LUTHER HALL BELLAMY,

Of the town of Brockm'lle. TERENCE HAMILTON,

Of Merrick, of the town of Broclmit'lle.

